CFWebstore uses Helvetica and Helvetica Neue by default. These are specified in foundation.min.css and can be changed in default.css. 

WEB FONTS

With the introduction of CSS3 web sites have been able to use almost any font available. Here's 3 great sources to include and use on your website. You can add them to default.css through the CSS Editor.

1. Google Fonts - Google Fonts is a free service that lets you include fonts into your store. All you have to do is incude a @import code into default.css. 
2. Generate a Webfont - You can now take a font and generate code that will be automatically downloaded to your users. A popular service is FontSquirrel.com for generating the proper files. Remember, just because you have a font on your computer does NOT mean its legal to use on your website. Look online for commercial-free fonts. 
3. Adobe Typekit - For a monthly fee, you can use almost any Adobe font. 

Remember, each user has to download these font files which means a slightly slower page load on the first page of your website. One or two fonts won't be noticed but a dozen might be. Be judicious in your use.